if romney turns in a strong debate, you hope you have an economy ad that helps governor romney build on any momentum out of the debate. number three, both campaigns and friends, democratic super pakz and republican super pacs have to make tough decisions over the next three weeks, five weeks left in the campaign, but over the next three to four weeks you have to make decisions not only where to spend money and spend more money, but where to take resources out. that's the toughest decision to campaign. not necessarily where to spend, it is where not to spend. when you have a big buy like this, then you poll, you see if you're moving the numbers. and in some of states you'll keep the ads, some states, watch in a week, ask have they pulled out? that will tell you something. >> crunch time indeed, john king, thank you for us in denver. no pressure as millions, millions will be watching tomorrow night's first presidential debate. all comes down to the two men on stage, the public will perceive one of them is the winner as we have seen in history, one line, one line can make all the differ